Enhanced photocatalytic reduction of hexavalent chromium ions over Zn-bearing in CuZn hydroxy double salts: Insight into the structural investigation using extended X-ray absorption fine structure

Plasma synthesis of oxygen vacancy-rich CuO/Cu2(OH)3NO3 heterostructure nanosheets for boosting degradation performance

“…The peak at 1046 cm À1 is associated with N-O stretching pulsations in the monodentate O-NO group, while the vibrational peaks at 810 cm À1 and 716 cm À1 are attributed to the presence of NO 3 À . 28,31 In addition, the peaks at 873, 769, and 667 cm À1 are caused by the bending vibrations of the Cu-O-H groups with distinct hydrogen bonds in Cu 2 (OH) 3 NO 3 . 31,32 The vibrational peak within the range of 400-600 cm À1 is attributed to the presence of metal-oxygen bonds in Cu 2 (OH) 3 NO 3 .…”

“…28,31 In addition, the peaks at 873, 769, and 667 cm À1 are caused by the bending vibrations of the Cu-O-H groups with distinct hydrogen bonds in Cu 2 (OH) 3 NO 3 . 31,32 The vibrational peak within the range of 400-600 cm À1 is attributed to the presence of metal-oxygen bonds in Cu 2 (OH) 3 NO 3 . 28,32 For CHN-80, the Cu-O vibrational peak of CuO remains at 609 cm À1 by DBD treatment, indicating the formation of a CuO/Cu 2 (OH) 3 NO 3 composite.…”

“…The peaks at 1415 cm À1 and 1320 cm À1 correspond to the asymmetric and symmetric stretching vibrations of O-NO 2 , respectively. The peak at 1046 cm À1 is associated with N-O stretching pulsations in the monodentate O-NO group, while the vibrational peaks at 810 cm À1 and 716 cm À1 are attributed to the presence of NO 3 À 28,31. In addition, the peaks at 873, 769, and 667 cm À1…”